Temperature-preserving electrically heated cooker

ABSTRACT

The invention relates to a temperature-preserving electrically heated cooker comprising a body comprising a housing and a container between which a first temperature-preserving chamber is constituted; a lid connected to the upper part of said body; heating means for heating said container; a controller for controlling a heating time and a heating temperature of said heating means; and a base positioned under said body and connected separately thereto. The temperature-preserving electrically heated cooker according to the invention is of a simple structure, and can be used not only to cook, but also to keep the food warm.

FIELD OF THE INVENTION

[0001] The invention relates to a household cooker, more particularly toa temperature-preserving electrically heated cooker.

[0002] 1. Background of the Invention

[0003] A conventional electrically heated cooker keeps food warm byintermittently heating, but its structure does not have such a function.To keep food warm for a long time means a big waste of energy. However,a conventional temperature-preserving container cannot be used to cookfood.

[0004] 2. Disclosure of the Invention

[0005] An object of the invention is to provide a temperature-preservingelectrically heated cooker to solve problems in the prior art.

[0006] A temperature-preserving electrically heated cooker according tothe invention, comprising

[0007] a body comprising a housing and a container between which a firsttemperature-preserving chamber is constituted;

[0008] a lid connected to the upper part of said body airtightly;

[0009] heating means for heating said container;

[0010] a controller for controlling a heating time and a heatingtemperature of said heating means; and

[0011] a base positioned under said body and connected separatelythereto.

[0012] Said first temperature-preserving chamber in said body may be avacuum space or may be filled with insulating materials.

[0013] Said lid may comprise a second temperature-preserving chamber,which may be a vacuum space or may be filled with insulating materials.

[0014] Said heating means may be a heating film or a plurality ofelectrically heating tubes positioned on the outside of the container.The number of the electrically heating tubes depends on the heatingtemperature or the heating time needed for cooking.

[0015] Said electrically heating tubes may be disposed on the bottom ofthe container and/or on the outer side of the container, and may becovered by insulating materials.

[0016] In the cooker of the present invention, a control panel may bearranged on the base to control the heating time and the heatingtemperature.

[0017] The temperature-preserving electrically heated cooker accordingto the invention may further comprise a base support disposed under thebody. Insulating materials may be filled between the base support andthe body.

BRIEF DESCRIPTION OF THE DRAWINGS

[0018]FIG. 1 is a side cross sectional view showing an embodiment of thetemperature-preserving electrically heated cooker in accordance with thepresent invention.

[0019]FIG. 2 is a side cross sectional view showing another embodimentof the temperature-preserving electrically heated cooker in accordancewith the present invention.

[0020]FIG. 3 is a side cross sectional view showing a further embodimentof the temperature-preserving electrically heated cooker in accordancewith the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

[0021] The invention will be described in details with the followingexamples in conjunction with the accompanying drawings.

EXAMPLE 1

[0022]FIG. 1 shows a temperature-preserving electrically heated cookerin accordance with the present invention. In the Figure, an inner wall 1a and an outer wall 1 b of a lid 1 constitute a vacuum space; and aninner wall 3 a of and an outer wall 3 b a body 3 constitute anothervacuum space. The lid 1 and the body 3 are tightly locked together witha buckle and a sealing washer 2 to prevent food from leaking orspelling.

[0023] Heating means 4 comprising a plurality of electrically heatingtubes are arranged on the outer surface of the wall 3 a of the body 3.The heating means 4 do not contact the inner surface of the wall 3 b ofthe body 3. Thus, when food in the cooker is heated with theelectrically heating tubes, while the outer wall 3 b of the body 3 iskept at an ambient temperature. A temperature sensor 14 is fitted on theinner wall 3 a of the body 3 and is separated from the inner wall 3 a ofthe body 3 with insulating materials so as to measure the realtemperature in the container.

[0024] The body 3 of the cooker is fixed on a support 9. A plug 5connected to the outer wall 3 b of the body 3 is set on the support 9.One end of the plug 5 is connected to the heating means 4 and the sensor14 through a lead and the other end is inserted into a socket 6 set on abase 8. A control panel 7 is set on the base 8 to control the heatingtime and power of the heating means 4.

[0025] When the body 3 is put on the base 8, the plug 5 is inserted intothe socket 6. Thus, the container is heated. After food is cooked well,the power is switched off. However, the food is still kept warm for along time even if the body 3 is moved from the base 8.

[0026] An exhaust pipe 10 is fixed on the lid 1. The exhaust pipe 10 isopen to air at one end through a sealing washer 2 and the lid 1, and isconnected to the inside of the container to discharge the steam thereinso that the pressure in the cooker can be reduced for safety.

EXAMPLE 2

[0027]FIG. 2 shows another temperature-preserving electrically heatedcooker in accordance with the present invention. In the Figure, heatingmeans 4 is fixed and exposed on the outer surface of the bottom of thebody 3. The heating means 4 may consist of a plurality of electricallyheating tubes or an electrically film. Said electrically heating tubesare enclosed by the bottom of the body 3 and the support 9 of the body.Other parts of the cooker are the same as those described in Example 1.

EXAMPLE 3

[0028]FIG. 3 shows another temperature-preserving electrically heatedcooker in accordance with the present invention. The cooker in thisexample is similar to that in Example 1, except that a temperaturecontrol is set in a mechanical manner.

[0029] A stand 11 of a thermostat is set on the base 8. A springthermostat 12 is set between the housing 13 of the thermostat and thestand 11. When the body 3 is placed on the base 8, the housing of thethermostat contacts the inner wall of the body 3 via a press spring tocontrol the temperature of heating.

[0030] The present invention possesses advantages that the cooker is ofa simple structure, and can be used not only to cook, but also to keepthe food warm.

What I claim is:
 1. A temperature-preserving electrically heated cookercomprising a body comprising a housing and a container between which afirst temperature-preserving chamber is constituted; a lid connected tothe upper part of said body; heating means for heating said container; acontroller for controlling a heating time and a heating temperature ofsaid heating means; and a base positioned under said body and connectedseparately thereto.
 2. A temperature-preserving electrically heatedcooker according to claim 1 , wherein said cooker further comprises asupport under the bottom of the body.
 3. A temperature-preservingelectrically heated cooker according to claim 1 , wherein said firsttemperature-preserving chamber is a vacuum space.
 4. Atemperature-preserving electrically heated cooker according to claim 1 ,wherein said lid comprises a second temperature-preserving chamber.
 5. Atemperature-preserving electrically heated cooker according to 1,wherein heating means is a plurality of electrically heating tubespositioned on the outer surface of the container.
 6. Atemperature-preserving electrically heated cooker according to claim 5 ,wherein said electrically heating tubes are positioned on the bottomor/and on the outer side of the container.
 7. A temperature-preservingelectrically heated cooker according to claim 5 , wherein saidelectrically heating tubes are covered by insulating materials.
 8. Atemperature-preserving electrically heated cooker according to claim 1 ,wherein a control panel is fixed on the base for setting a heatingtemperature and a heating time.
 9. A temperature-preserving electricallyheated cooker according to claim 2 , wherein said firsttemperature-preserving chamber is a vacuum space.
 10. Atemperature-preserving electrically heated cooker according to claim 2 ,wherein said lid comprises a second temperature-preserving chamber. 11.A temperature-preserving electrically heated cooker according to 2,wherein heating means are a plurality of electrically heating tubespositioned on the outer surface of the container.
 12. Atemperature-preserving electrically heated cooker according to claim 11, wherein said electrically heating tubes are positioned on the bottomor/and on the outer side of the container.
 13. A temperature-preservingelectrically heated cooker according to claim 11 , wherein saidelectrically heating tubes are covered by insulating materials.
 14. Atemperature-preserving electrically heated cooker according to claim 2 ,wherein a control panel is set on the base for setting a heatingtemperature and a heating time.